Claude Fable 5.2 now available on Vercel AI Gateway
Vercel announced that Anthropic's Claude Fable 5.2 is available on AI Gateway. The model supports effort levels low, medium, and high, with high as the API default, and has cybersecurity and biology safety classifiers enabled.
Why it matters
Builders can call Claude Fable 5.2 through AI Gateway using the model name anthropic/claude-fable-5.2. Access requires data retention, so teams with Zero Data Retention enabled will receive an error instead of a response. Model fallbacks can be configured so requests route to Opus 5.5 or Sonnet 5.5 when the cybersecurity classifier declines a request.
Who should care
Developers building coding agents, AI-powered applications, and teams using AI Gateway with Zero Data Retention policies.
What you can do
Set a model fallback array in providerOptions.gateway with anthropic/claude-fable-5.2 as the primary model and Opus 5.5 or Sonnet 5.5 as fallbacks, then test it against your ZDR settings.